diff --git a/aiogram/dispatcher/event/telegram.py b/aiogram/dispatcher/event/telegram.py
index e52013f4..424ffeb3 100644
--- a/aiogram/dispatcher/event/telegram.py
+++ b/aiogram/dispatcher/event/telegram.py
@@ -148,7 +148,9 @@ class TelegramEventObserver:
             middleware = functools.partial(m, middleware)
         return middleware
 
-    def wrap_outer_middleware(self, callback: Any, event, data) -> Any:
+    def wrap_outer_middleware(
+        self, callback: Any, event: TelegramObject, data: Dict[str, Any]
+    ) -> Any:
         wrapped_outer = self._wrap_middleware(self._resolve_middlewares(outer=True), callback)
         return wrapped_outer(event, data)
 
diff --git a/aiogram/dispatcher/router.py b/aiogram/dispatcher/router.py
index 1d18e80e..b776bcdf 100644
--- a/aiogram/dispatcher/router.py
+++ b/aiogram/dispatcher/router.py
@@ -95,9 +95,9 @@ class Router:
         kwargs.update(event_router=self)
         observer = self.observers[update_type]
 
-        async def _wrapped(e, **data):
+        async def _wrapped(telegram_event: TelegramObject, **data: Any) -> Any:
             return await self._propagate_event(
-                observer=observer, update_type=update_type, event=e, **data
+                observer=observer, update_type=update_type, event=telegram_event, **data
             )
 
         return await observer.wrap_outer_middleware(_wrapped, event=event, data=kwargs)